“Glenn Simpson, the co-founder of investigative firm Fusion GPS, met with staff of the Senate Judiciary Committee as part of the committee’s investigation into Russian meddling and potential collusion with the Trump campaign in the 2016 presidential election.A committee spokesperson did not give Fox News any further information on the meeting with Simpson and Judiciary staff, though a source confirmed that Fusion GPS has given the Senate committee over 40,000 documents.

“Mr. Simpson told Congress the truth and cleared the record on many matters of interest to congressional investigators,” his attorney Josh Levy told Fox News.

Simpson’s company was behind the dossier that was compiled during last year’s campaign and which contained crude allegations against now-President Trump.

Committee Chairman Chuck Grassley, R-Iowa, and committee Ranking Member Sen. Dianne Feinstein, D-Calif., originally had issued a subpoena for Simpson’s testimony at a public hearing before the committee last month. But they withdrew it after Simpson reached arrangements to interview with the committee in private.”

“The committee’s hearing in July pertained to oversight of the Foreign Agent Registration Act (FARA). At the public session, CEO and founder of Hermitage Capital Bill Browder testified that Fusion GPS and Simpson worked “on behalf of the Russian government” in an effort to fight U.S. sanctions that had enraged Moscow’s elite.

Browder told lawmakers that Russian lawyer Natalia Veselnitskaya, who met with Donald Trump Jr. at Trump Tower in June 2016, also was responsible for hiring Simpson to “conduct a smear campaign against me and Sergei Magnitsky in advance of a congressional hearing on the Global Magnitsky Act.” The Magnitsky Act is a U.S. law that brings sanctions against Russian oligarchs suspected of money laundering.”

Wikipedia: “Aleksej Gubarev, chief of technology company XBT and a figure mentioned in the dossier, sued BuzzFeed for defamation on February 3, 2017. The suit, filed in a Broward County, Florida court,[76] centers on allegations from the dossier that XBT had been “using botnets and porn traffic to transmit viruses, plant bugs, steal data and conduct ‘altering operations’ against the Democratic Party leadership”.[77]

After the hearing, Fusion GPS responded to Browder’s allegations — saying they had “complied with the law” and were “not required to register under FARA,” and “did not spread false information about William Browder or Sergei Magnitsky.”

“What is clear is that the president and his allies are desperately trying to smear Fusion GPS because it investigated Donald Trump’s ties to Russia,” Fusion GPS said in a statement to Fox News last month. “They have pulled out all the stops, including this false allegation about FARA.”

Paul Singer in June at an event for investors in New York.CreditMisha Friedman/Bloomberg

WASHINGTON — The Washington Free Beacon, a conservative website funded by a major Republican donor, first hired the research firm that months later produced for Democrats the salacious dossier describing ties between Donald J. Trump and the Russian government, the website said on Friday.The Free Beacon, funded in large part by the New York hedge fund billionaire Paul Singer, hired the firm, Fusion GPS, in 2015 to unearth damaging information about several Republican presidential candidates, including Mr. Trump. But The Free Beacon told the firm to stop doing research on Mr. Trump in May 2016, as Mr. Trump was clinching the Republican nomination.Hillary Clinton’s campaign and the Democratic National Committee had begun paying Fusion GPS in April for research that eventually became the basis for the dossier.The Free Beacon informed the House Intelligence Committee on Friday that it had retained the firm.NY Times